Yang Ming, Yao Ni, Surmenev Roman A, Zhang Xinxin, Yu Jianyong, Zhang Shichao, Ding Bin
Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, China.
Physical Materials Science and Composite Materials Center, Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk, 634050, Russia.
Macromol Rapid Commun. 2025 Jul;46(13):e2401058. doi: 10.1002/marc.202401058. Epub 2025 Jan 27.
Electrospun fibrous materials with fine fibers and small pores are fundamental for particulate matter (PM) filtration, addressing its harmful environmental and health impacts. However, the existing electrospun fibers are still limited to their sub-micron diameters and unstable surface electrostatic effect, leading to deteriorated filtration performance after prolonged storage or wetting. Herein, the study creates nanofibrous membranes with long-time stable electrostatics by electret-enhanced electrospinning. The phase separation and polarization of the charged jet are manipulated to achieve rapid stretch and strong electret. The obtained membrane exhibits nanosized structures with fiber diameters of ≈220 nm, pore size <1 µm, as well as robust surface potential of 0.4 kV. By virtue of the synergistic effects of sieving and adsorption, the nanofibrous membrane showed a remarkable PM filtration efficiency of 96.6% and pressure drop of 140 Pa, even reaching the N90 standard after five wetting cycles. The design of such durable membranes will offer a new sight in the functional filtration materials.
具有细纤维和小孔的电纺纤维材料对于颗粒物（PM）过滤至关重要，可应对其对环境和健康的有害影响。然而，现有的电纺纤维仍受限于其亚微米直径和不稳定的表面静电效应，导致长时间储存或润湿后过滤性能下降。在此，该研究通过驻极体增强电纺丝制备了具有长期稳定静电的纳米纤维膜。通过控制带电射流的相分离和极化来实现快速拉伸和强驻极体。所获得的膜呈现出纳米尺寸结构，纤维直径约为220nm，孔径<1μm，以及0.4kV的强大表面电位。凭借筛分和吸附的协同作用，该纳米纤维膜显示出96.6%的显著PM过滤效率和140Pa的压降，甚至在五次润湿循环后仍达到N90标准。这种耐用膜的设计将为功能性过滤材料提供新的视角。
